/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/NiagaraGraph.h
Sets the meta-data associated with this variable. Creates a newUNiagaraScriptVariableif the target variable cannot be found. Illegal to call on FNiagaraVariables that are Niagara Constants.
void SetMetaData ( const [FNiagaraVariable](API\Plugins\Niagara\FNiagaraVariable) & InVar, const [FNiagaraVariableMetaData](API\Plugins\Niagara\FNiagaraVariableMetaData) & MetaData )